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Tuesday, January 29, 2013

What Are The Top 5 DDoS Protection Techniques?

Experts in the cyber world agree on one thing and that is the alarming simplicity and massive dangers of distributed denial of service attacks. These attacks, also known as DDoS attacks, come in many forms and have taken down websites of large organizations including banks. This is extremely dangerous not just for the organization that is under attack but also the different users and clients that access the websites or online services of such an organization. Therefore it is imperative to take adequate steps to protect a websiteto withstand and deflect such DDoS attacks. There is a vast range as far as techniques of DDoS protection go but here is a list of the best of these techniques.

Going with geographical blocking. This may seem like a rather big and extreme step to take but has had its benefits for quite a few websites. Essentially, geo-blocking works when a network identifies a particular region or country that is sending most of the “bad” or dangerous traffic to their site. This network or website will then take steps to block off the entire region or country. This eliminates all traffic that originates from these countries and therefore needs a lot of thought before being implemented.

Using SYN Proxy - whenusing a SYN attack mode, DDoS attacks use multiple computers to transmit SYN packets by replicating otherwise genuine IP addresses. The receiving server adds these packets to a central data structure of its own but since these are false packets or false commands, the network is unable to respond to these data packets and therefore cascades into failure. By making use of SYN proxy protection, a network can deploy a kind of gateway appliance that resides in front of the actual server. This mechanism waits until the false IP address responds with the right kind of acknowledgement and only then forwards connection requests to the actual server.

Investing in robust IT infrastructure - one of the ways in which DDoS can be mitigated is to invest in extremely superior IT infrastructure. If an organization has enough bandwidth that can help it sustain and deflect DDoS attacks then it can survive rather easily. Basically this means that an organization has more muscle power by way of processing power and network bandwidth that will prove mightier than any level of DDoS attacks.

Limiting connections - one of the ways in which DDoS attacks work is by causing a server to crash because they can overloaded it with requests for connections. One of the ways in which such an attack can be countered is by limiting the requests for new connections and giving the server time to digest and process pending requests before moving on to new ones.

Dynamic filtering - considering the fact that the landscape of DDoS attacks is constantly changing and attackers are evolving to newer and more lethal methods, DDOS prevention services should also go through this kind of dynamic growth. Dynamic filter helps in deflecting such bad traffic by creating a short span filtering rule. This rule can be eliminated once a specific time duration has lapsed.